Milk cooler



Oct. 13, 1931. 1. J. B. DEMERs MILK COOLER Filed 0611. 6, 1930 v 2 Shets-Sheet l Isa/ie eme 71s' W W kW Oct. 13, 1931.

l. J. B. DEMERS MILK COOLER Filed Oct. 6. 1933 Isa/ie Il'emers tnte d Oct. '13, 193i z ISAE J. Bfnnnnns; s'ij'; Penn, urnnno'r'n, Aspsxcfno'n 'ro Vs'o'r'nmon ME'TL rnon-J,

17.018 COMPNYzOrsr-'1PAUVMINNESQIA;AGORPORAHON OF UELA'WAREI I' g taken on the line -5 of Fig. 3.

themilk or otherfluidzto be cooledo Another 1 object is to facilitatecontrol;ofe-temperature:

and' rate of heattransfer in-the device: to thereby Vpermit'. conipensation 'for Cooling fluidsof different temperatures" The inven- E15 tion also includes certain other novel features of construction which vwill be' more 'fullv pointe'd out in the following specification and claims.' o'

: In the drawings, Figure a central'ver:V tical section through myf'imp'roved {cooler Fig.'2 is a perspeotive view showing'the'same o inconnection with a suitablyv Controlled milk supply; 'Fig. 3 is a central VVertical sectionv through the outer casing and,;sl1owingthe- Cooling element partiall'yrwithdrawn; :Figi 4 is a horizontal section taken on the line 4-4 of Figi. and Fig. 5 is'a'horizontal. section The cooler has| a cylindrical, outerfcasing 6, closed at its bottom 7 i and. openat its top. Around the upper edge ;of 'the casing 6 is a flaring bowl 8 and an' Outlet spout 9for-the milk or other fluid'to be cooled communicates with the bowl 8. 'An inner' casing 10. is' removably mounted'within .thef'casing 6V in spaced relation thereto and has a cylindrical drum Shape, being closed at'itsfiupper and lowerends. fz *-1 vi In theannular space between the outerzand inner casings, a cylindrical cooling element 11 removably fits. This cooling element has an upper end portion'forming a central reservoir 12, above the' casing V10,V for a supply ofgthe fluid to be cooled, ;The reservolr communi cates withl an annular vpassage 13 between lthe inner casing'1O`and4 an inner wall 141v of the Cooling element 11; A multiplicityfoffsmall projections 15 are formed on the wall 14 to engage the casing andfmaintainthe proper uniform spacing ofthe adj avcent elements. I

Lthence. out through the lspout 9.

' andouterwalls;

' reservoir 12 in the cooler.

;thusiinsurethat passage 13 for fluid'is i very thin orattenuated'one of uniform thickness.V ;At its lower end'the passage 18 communicates witha. concentric, annularpassage i. *ltbetween ;the /outerfcasing 6 and an outer wall 17 of-the Cooling element 11-. This :wall 17 hassmall' projections 18similar to the ro,-v Jectlons 'for maintaining the wall 1 in proper spaced relation to the casing 6. The upper end of the .passage 16 communicates from. the central reservoir ;Withthe bowll 8, so that milk readily flows downward through the passage 13,V then upward f through the passage V16V to thebowl 8 and i A suitable cqoling fiuid is'admiadto the 'element .11- through' an'inlet'pipe 19 which commumcates vwith an annular conduit'20 in head 12.V i ;The conduit-20 distributes cool- 1mg fluid to an attenuated. annular space between the wall17 of the cooling element an annular baffle 21 extendingbetween the i inner` and outerwalls of said coolingelement. o

The balfle 2l=consists of a bodyv of insulating material having a suitable covering ofsheet metal secured in s acedrelation to theinner he space between the wall 17 and baflle connects at its lower end With a w similar space between the'balfle and innerwall V14 of 'the Cooling element. By this arrange'- ment the cooling fluidis caused to pass down- Ward a-djacent to the outer wall of the Cooling element and ,upward adjacent` to the inner (walljthereof; theV baflle being 'arranged to separatethe annular conduit 20 from a 'simi'lar conduit 22 communicating with theV space between the baflle 21 and wall 14:;l An outlet pipe 23 for thec'oolingrfiuid communicates with theconduit 22. The openings" through the pipes 19 and 23 are preferalolyf1 somewhat larger, in cross sectional area, than the area {ofthezspace betweenl the bafl'le and outer or innerwalls of the coolingrelement so thatthe fcooling fluid isuniformly distributed around the'baflie., a A supply tank 24 forv the milk or other fluid tovbecooled is provided with an Outlet 'spigot 25 to deliver the fluid to the central IIn use, the pipes 19 and 23 may beconnect ed to suitable supply and wast-e pipes or hose, and Cooling fiuid is supplied under pressure to the pipe 19. The fiuid to be cooled is placed in the tank 24 and by regulating the opening in the spigot 25 the rate of flow is adj usted to give the desired Cooling, If a 'very cold waterV or other Cooling fiuid is available for passage through the Cooling element, the milk may be passed rapidly through the cooler. To increase the flow of milk, the spigot 25 is opened sufficiently to produce a. substantial head in the reservoir 12 and relatively 'rapidv 'Cause of my arrangement-of the baffie 21 containingthe body 'of insulating material.

By my arrangement of all inlet and Outlet Connections Communicati-ng with the upper portion of the apparatus, l greatly simplify the contruction and at the same time make the several surfaces which contact with ithemill: vreadily accessible for 'thorough cleansing.

:Thus when the device is to be cleaned andV sterilized thev Cooling 'element 11 bo quiclrly withdrawn from the outer Casing 6 and the inner Casing 10 may also be removed.

All surfaces requiring attention are-now vreadily acces'sible.

Simplicity. and ease of ha-ndling is promoted by making the several parts of the Cooling element permanently secured together and sealed. The Cooling element, with itsconnections and vdistributing conduits, is a rigid, unitary vstructure of rugged, durable Construction. By employing the small projections 15 and 18, 1 insure the maintenance of uniform spaCing and at the same time the passages for liquid are made unusually thin. lt has been found that these thin passages, combined witha considerable head of liquid, promote rapid Cooling or transfer of heat by Causing rapid and uniform fiow throughout the passages.

Having described my invention what I laim as new and desire to protect by Lettera Patent is:v

1. A cooler for flui-ds Comprising, outer and inner Casings spaced apart, a unitar'y Cooling 'element located between said outer and inner Casing members, means for maintaining said Cooling element in spaced relation to said inner and outer Casin'g members to vprovide attenuated spaces for fluid to becooled, an inlet for supplying fluid to be cooled Communicating with the space between said Cooling element and inner Casing, an Outlet-for said Vrelation to said inner and outer Casing members, means 'for supplying fluid to be cooled 'to the space between said Cooling element and innercasing, an Outlet for said fluid Commumcatmg with said outer casmg near its upper endfandinletand outlet pipes for Cooling fluid commiunicating with said Cooling element above said-outer Casing.

3. A milk coolercomprising, outer and in- -ner casings spa-ced apart, a unitary Cooling element having outer and inner walls located f etwen-saidlouter and inner casing members,

means for maintaining said Cooling element in spaced relation lto said inner and outer casing members to :provide attenuated mill: passageways, communicating with each other at their lower ends, means for supplying milk to the passageways between said Cooling element and inner c-asing, an outlet for milk communicating with said outer casing near its upper end, an annular baffle extending within said Cooling unit between its outer and inner walls, an 'inlet for Cooling fiuid communicating Vwith the outer surface of said baffle and an Outlet for Cooling fiuid Communicating 'withthe inner surface of said baffle, said balfie being-arranged to direct Cooling fluid downward adjacent to'the outer wall of the Cooling unit and upward adjacent to the inner wall'thereof.

4:. ;A cooler compri'sing, outer and inner Casing members having an annular space be'- tween them, an ,annular Cooling element located between'said Casin-g members in spaced relation thereto and projecting above the same, a `reservoirforfluidto'be cooled formed in said Cooling element above said inner Casing member, an outlet Communicating with the .upper .portion of said outer Casing and means |for circulating Cooling fluid in said Cooling element.

5'. Ina mill Cooler, outer and inner cylindriC-al casing-spaced apart, a cylindrical Cooling element located in the space between said inner and outer Casing members, means for vmaintaining said Cooling element in spaced relation to said inner and outer Casing memberstoform annular passages for milk to be communicating with the upper end of said outer, annular passage and an Outlet for cooling fiuid Communicating with the upper end of said inner, annular passage. f

6. In a milk cooler, outer andV innercylindical casings spaced apart, a Cooling element located in the space between said inner and outer casing members and projecting above the same, means for malntainlng said Cooling element in spaced relation tosaid .inner and outer casing members to form attenuated, annular passages for milk to be cooled, a `head on said inner casing member forming the bottom of a cent-ral, open reservoir for milk to be cooled, the sides of said reservoir being 7 formedby said Cooling element, an outletofor cooled vniilk communicating with the upper portion .of said outer'casing, said Cooling'ele-v ment Comprisingouter and inner casing walls and an intermedlate battle formmg two VCon- Centric, annular spaces for Cooling fiuid Com-j lnunicating with Veach other atftheir lower ends, an 'inlet for Cooling fluid vCommunlcat'- mg with the upper end of sald outer, annular passage and an outlet for Cooling-fluid 'Comm-unicating with the upper end of said inner, annular passage, said Cooling element being sealed with the exception of said inlet and' outlet and being readily removable frornthe outer and inner caslngs to allow access for Cleaning to all surfaces contacting with the f 7. A milk cooler comprising, a Cylindrical outer casing, a fiaring upper edge portionsecured to said casing, an Outletl spoutcommunicating with saidiflaring. portion, a cylindrical inner Casing closedat its top and bottom and removably fitting within said outer Casing, a,

Cylindrical Cooling unit fitting within said outer casing and ada ted to surround said inner Casing, said coo ing unithaving cylindrical outer and inner walls slightly spaced from the inner surface of sa1d .outer casing and outer surface of sald inner caslng respectively, the lower Vend of sald coollng unit bering spaced from the bottom of said outer casing topermitthe passage .of milk downward adjacent to saidv inner casing and Vthen up- Ward adjacent to said outer casing and an annular portion of said Cooling unit projecting above said inner casing to provide a central milk reservoir, open at its top, said reservoir communicating with the space between said inner casing and Cooling unit.V

8. A milk cooler Comprising, a Cylindrical outer casing closed at its bottom and open at its top, fiaring upper edge portion secured to said casing, an outlet spout coinmunicating with said fiaring portion, a cylindrical inner casing closed at its top and bottom and removably fitting within said outer Casing,'a

cylindrical Cooling unit removably fitting within said outer Casing and adapted to surround said inner Casing, said coolingunit havlng cyllndrlcal outer 'and' lnner Walls slightly spaced `from the inner surface ofsaid outerfcasing and outer surface of saidv inner casing respectively, the lower end of said cooling ,unit beingspaced from the bottom ofv saidv outer Casing to permit the 'passage of niilk to be cooled downwardadjacent to said inner casing and then upward adjacent to said outer Casing, said Cooling unit projecting above said 'inner .Casing and being formed with with a central space for milk to be cooled Communicating with 'the space between said inner lCas'ing andscooling unit, and annular baflie `containing insulating material extending within said Cooling unit between its outer andinnei'gwalls, an annular inlet for Cooling fluid Commumcatlng with thetouter surface of said battle and an annular o'utlet for Cooling of said baflle, said bafile being arranged to direct CoolingV fluid ldownward adj acent to the outer wall of the Cooling unit and upward adjacent to the inner wall thereof.

9. In a milk'cooler, outer and inner casings `lfluid communicating with the inner'surface spaced apart, a' Cooling element located in v ing with each other at their lower endsand an inlet andanv outlet for Cooling fiuid4 communicating Withthe upper portion of said coollng element.

10. In a milk cooler, freely spaced inner and outer casings, an intermediate cylinder for the Circulation of a Cooling, fluid, inter-V posed in spacedrelation between said outer` and inner casings to vform a thin passageway for milkion both peripheries vof said Cooling element, and inlets and outlets located. at

thetop of the cooler for' mill: and Cooling fluid. v

11. In a milk'cooler, inner and outer casings, an intermediate cylinder containing peripheral Conduits insulated from each other for the Circulationof a Cooling fluid, said i Cylinderbeing slightly spaced from saidouter Vand inner caslngs,` to form thin, connected conduits forjmilk on both peripheries of said Cooling element, and inlets and outlets com'- municating with the top of thel conduits for milk and Cooling fluid.

In testimony whereof, 'I have hereunto sig'ned my name to this specification. i

` ISAIE J; B. DEMERS.` 

